TARGUS Hyperdrive Dual 4k Hdmi Adapter For M1 MacBook

The Dual 4K HDMI Adapter lets you connect to 2 HDMI displays, 1 at 4K 60Hz through HDMI and DP Alt-mode and 1 at 4K 30Hz through HDMI and Silicon Motion’s InstantView technology. Enjoy quickly charging devices with our USB-C 100W PD charging port. And, it’s fully compatible with MacBook Air/Pro (M1 & Intel powered) devices, Windows PC devices as well as Chromebook devices.

This adapter finally offers a real solution for having multiple external displays.
I've bought and returned several adapters because they all didn't solve my problem.
This one did the thing it was supposed to do.
Not happy because it was extremely expensive. But it DID solve the problem. I can now have 2 monitors plus my regular display on my macbook pro (m1 chip) that do not mirror each other. 3 different windows, 3 different screens. You'll have to download their app to make it work, but you'll only do it once and then the mac remembers your settings. Excellent!